Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (04): 601-604.doi: 10.3866/PKU.WHXB20070429

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Preparation of Cu/Sr3Ti2O7 and Its Photocatalytic Activity of Watersplitting for Hydrogen Evolution

FANG Shu-Mei; OU Yan; LIN Jing-Dong; LIAO Dai-Wei   

  1. Department of Chemistry, State Key Laboratory of Physical Chemistry of Solid Surfaces, Institute of Physical Chemistry, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2006-10-10 Revised:2006-11-21 Published:2007-04-05
  • Contact: LIAO Dai-Wei

Abstract: Sr3Ti2O7 photocatalyst with perovskite-layered structure was synthesized by polymerized complex method (PCM). Cu ion as an effective dopant was loaded onto Sr3Ti2O7 catalyst. Cu/Sr3Ti2O7 catalyst was applied in the mixture of water and methanol, methanol was used as a sacrificial agent under ultra-violet irradiation, and the catalyst was characterized by XPS, XRD, and UV-Vis DRS. The results showed that Cu existed in several kinds of valence and the photocatalytic activity of Cu/Sr3Ti2O7 was superior to that of pure Sr3Ti2O7. Cu+ and adsorbed oxygen can accelerate the interfacial electron transfer. When the amount of Cu was 1.5%(w), the best catalytic effect was obtained and the stable average hydrogen evolution rate was about 550-600 μmol·h-1. The Cu/Sr3Ti2O7 after reduction attained the highest hydrogen evolution rate that was close to 1140.8 μmol·h-1.

Key words: Perovskite, Water splitting, Hydrogen, Photocatalysts, Sr3Ti2O7


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